Seminar: “Flexible Nanoscale Electronics for Greener Emerging Technologies”

Friday, November the 18th, a seminar on “Flexible Nanoscale Electronics for Greener Emerging Technologies” will be presented by Dr Dimitra G. Georgiadou from the School of Electronics and Computer science at University of Southampton

Nov. 18th 2022, 2pm

Room Jacques Levisalles
(Tour 42, niveau S1)


Modern electronic devices are founded on semiconductor technology, with diodes and transistors being the cornerstone of solid-state electronics. The majority of diode-based devices, such as laser and light-emitting diodes (LEDs), Schottky diodes and rectifiers, photodiodes and solar cells, rely on vertical structures, where the semiconductor is “sandwiched” between the two electrodes. This device structure, though, is not ideal when nanoscale materials or ultrathin films are required, as it is challenging to deposit pinhole-free films. On the other hand, coplanar electrode architectures present several advantages, such as the realisation of nanodevices with lower power consumption, faster speed and higher level of integration, while the film thickness is controlled solely by the nanochannel length. However, their commercial exploitation has been hitherto impeded by technological bottlenecks, owing to the incompatibility of currently available fabrication techniques with industrial upscaling.

Adhesion lithography (a-Lith) is an innovative low-cost high-throughput technique for the fabrication of large aspect ratio (>100,000,000) metal electrode nanogaps (<15 nm) on a variety of substrates, including plastic. It will be shown how these electrodes have been implemented in the fabrication of high-speed diodes for advanced electronic applications, in particular, radiofrequency identification tags (RFIDs), nanoscale LEDs, photodetectors and resistive switching memories. A variety of advanced non-toxic materials have been employed, such as metal oxides, perovskites and polyoxometalates, deposited from solution at low temperatures, with processes fully compatible with plastic (flexible) substrates and following greener fabrication routes. 

The development of a new form of greener devices and systems that merge photonic, electronic and ionic effects, is expected to bring new prospects for in-memory computing and artificial visual memory applications.

Anna Proust